One other thing Peter

Beings as it was an escapewheel, you could probably see the results of a bent pinon on the escape wheel if you where checking the locking on each tooth as it goes around. I have used that before to detect slightly bent escape wheel pinons that are affecting timing.

Cheers,
Randall

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Seikoholic #1
Dr.Seiko,
Specializing in Seikology, Seikotherapy, and other Horological Dis-ease.
Made in the U.S.A.
"Like my old Granddaddy used to always say; the less a man makes declarative statements, the less apt he is to look foolish in retrospect."- Q.T. Four Rooms